How to Use the Mercado Livre Catalog MCP in Vercel AI SDK

Q: Can I stream category selection using Vercel AI SDK and Mercado Livre Catalog?

Yes. The agent calls getcategories to fetch the top-level taxonomy and streams the options straight to your React UI. Sifting through Brazilian marketplace categories becomes a fast, interactive experience for your users.

Q: How do I authenticate my sellers in Mercado Livre Catalog when using Vercel AI SDK?

You configure the SDK's createMCPClient with an OAuth token provider. The server uses this token to run createitem or updateitem securely on behalf of the logged-in merchant.

Q: What happens if a listing creation fails mid-stream?

If the MCP Server rejects a payload during createitem, the stream halts and exposes the raw platform error. Your frontend can catch this failure state instantly to show the merchant exactly which attribute failed validation.

Feed real-time Mercado Livre Catalog updates directly to your frontend with the Vercel AI SDK.

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Connect Mercado Livre Catalog MCP to Vercel AI SDK

Create your Vinkius account to connect Mercado Livre Catalog to Vercel AI SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Mercado Livre Catalog with Vercel AI SDK

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Live pricing updates in your UI

Your users don't want to wait for a full page reload when changing inventory. When you run `update_price` and `update_stock` through the Vercel AI SDK, the updated numbers stream directly into your Next.js components. This means your merchants get immediate visual confirmation the moment the platform registers the change. No awkward loading spinners, just raw data piping into the browser as it happens.

Live listing creation with this MCP Server

Drafting products manually is slow, but this MCP Server lets your agent build listings step-by-step. By calling `get_domain_attributes` and `create_item`, your application displays the generated title and category attributes to the merchant in real-time. The seller watches their catalog entry take shape on screen. If something looks wrong, they can stop the generation mid-stream and tweak the details before publishing.

Instant search inside your active catalog

Finding specific items across thousands of listings is usually a bottleneck. Using this MCP Server, your interface can stream matches from `search_items` directly into a dropdown menu as the seller types. The agent pulls the exact record details with `get_item` instantly. Your frontend renders the live stock levels and pricing structures without lagging the browser.

Setup guide

Set up Mercado Livre Catalog MCP in Vercel AI SDK

Prerequisites

Node.js 18+ and a TypeScript project
ai + @modelcontextprotocol/sdk packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies

Run npm install ai @modelcontextprotocol/sdk plus your preferred model provider (e.g. @ai-sdk/openai).
2

Create the Streamable HTTP transport

Use StreamableHTTPClientTransport with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and use tools

Call mcpClient.tools() to auto-discover all Mercado Livre Catalog tools. Pass them directly to generateText() or streamText() — no manual schema definitions needed.
4

Works with any model provider

Swap openai("gpt-4o") for any AI SDK provider — Anthropic, Google, Mistral. The MCP tools work identically across all supported models.

index.ts

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

const transport = new StreamableHTTPClientTransport(
  new URL("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
);

const mcpClient = await createMCPClient({ transport });
const tools = await mcpClient.tools();

const { text } = await generateText({
  model: openai("gpt-4o"),
  tools,
  prompt: "List recent Mercado Livre Catalog transactions",
});

console.log(text);
await mcpClient.close();

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mercado Livre. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Mercado Livre Catalog MCP in Vercel AI SDK

We route all API calls through V8 isolate sandboxes to keep latency low. If you hit platform limits while executing `update_stock`, the client catches the error immediately so you can handle retries gracefully in your Edge Functions.

Yes. The agent calls `get_categories` to fetch the top-level taxonomy and streams the options straight to your React UI. Sifting through Brazilian marketplace categories becomes a fast, interactive experience for your users.

You configure the SDK's `createMCPClient` with an OAuth token provider. The server uses this token to run `create_item` or `update_item` securely on behalf of the logged-in merchant.

If the MCP Server rejects a payload during `create_item`, the stream halts and exposes the raw platform error. Your frontend can catch this failure state instantly to show the merchant exactly which attribute failed validation.

All listing data, pricing updates, and stock levels pass through ephemeral, zero-trust V8 isolates. We never write your store's catalog details to persistent storage. Your API tokens and inventory numbers exist only in memory during active tool execution.

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